Extension of LES-Based Analysis of Rotor Turbulence-Ingestion Noise
Abstract
We propose a one-year extension of the rotor-turbulence-ingestion noise project to com-plete the numerical simulations and analysis of the hydroacoustics of a rotor in turbulentwakes. Significant progress has been made over the past three years in developing compu-tational tools, predicting the sound from rotor interaction with grid-generated turbulenceand a turbulent cylinder wake, and understanding the source mechanisms. The investiga-tion of rotor ingesting grid turbulence is complete, and the study of rotor ingesting waketurbulence is well underway. In the latter case we have completed numerical simulationsof the baseline configuration with zero rotor thrust and the cylinder wake striking the ro-tor center, and validated the flow and acoustic results against the experimental data fromVirginia Tech. The next step is to investigate the acoustic radiation under more realisticoperating conditions and analyze the acoustic source mechanisms. We propose to performa number of simulations with different rotor advance ratios and wake striking positions, val-idate the accuracy and robustness of the computational approach under these conditions,and analyze the simulation data to elucidate acoustic source processes including turbu-lence distortions by the rotor, their role in noise production, and their dependence on thethrusting condition and wake striking position.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2017
- Source ID
- N000141712493
Entities
People
- Meng Wang
Organizations
- Office of Naval Research
- United States Navy
- University of Notre Dame